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Hot planets hiding under a shroud of dust and gas

12 Jan 2020, 12:02 UTC
Hot planets hiding under a shroud of dust and gas
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Title: Dispersed Matter Planet Project Discoveries of Ablating Planets Orbiting Nearby Bright StarsAuthors: Carole A. Haswell, Daniel Staab, John R. Barnes, Guillem Anglada-Escudé, Luca Fossati, James S. Jenkins, Andrew J. Norton, James P.J. Doherty, Joseph CooperFirst Author’s Institution: School of Physical Sciences, The Open University, Milton Keynes, UKStatus: Accepted to Nature Astronomy, closed access [open access on arxiv]Giant exoplanets in tight orbits around their host stars were one of the first ones to be discovered using the radial velocity (RV) technique until the Kepler Space telescope found a flurry of short period low mass planets using the transit technique. While transit photometry tells you about the radius of the planet, RV measurements can be used to determine their mass. Both mass and radius measurements of planets are important for understanding the bulk properties of the exoplanets and their atmosphere. Using RVs for conducting a search for low mass short-period planets and measuring their mass can be rather challenging though, even more so if the host star is faint. However, there could already be a smoking gun for the presence of these planets! Close-in low mass exoplanets suffer ablation of dust and gas from their surface and atmosphere due to high ...

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